// components/music/music.js
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    playlist: {
      type: Object
    }
  },

  observers: {
    ['playlist.playCount'](count){
     this.setData({
       _count: this._tranNumber(count,2)
     })
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    _count: 0
  },

  /**
   * 组件的方法列表
   */
  methods: {
    goToMusiclist(){
      wx.navigateTo({
        url: `../../pages/musiclist/musiclist?playlistId=${this.properties.playlist.id}`,
      })
    },
    _tranNumber(num,point){
      let numStr = num.toString().split('.')[0]
      if(numStr.length < 5) {
        return numStr
      }else if(numStr.length >= 5 && numStr.length <= 8){
        let decimal = numStr.substring(numStr.length - 4,numStr.length-4 + point);
        return parseFloat(parseInt(num/10000) + '.' + decimal) + '万'
      }else if(numStr.length >= 8){
        let decimal = numStr.substring(numStr.length - 8, numStr.length - 8 + point);
        return parseFloat(parseInt(num / 100000000) + '.' + decimal) + '亿'
      }
    }
  }
})
